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Gemini 3.1 Pro vs Kimi K2 Thinking

Token pricing, context window and real monthly cost, side by side. Kimi K2 Thinking is the cheaper of the two for a typical workload — about 4.2× less.

cheaper for a typical workload
Kimi K2 Thinking
saves 76% vs Gemini 3.1 Pro at 1,500 in / 500 out × 200,000/mo
Gemini 3.1 Pro $1,800/mo
Kimi K2 Thinking $430/mo
Gemini 3.1 Pro versus Kimi K2 Thinking specifications and price.
metric Gemini 3.1 Pro Kimi K2 Thinking
Input / 1M $2.00 $0.60
Output / 1M $12.00 $2.50
Context 1.0M 262K
Cost @ typical workload $1,800/mo $430/mo
Modality text + image + audio + video Text only
Price source list routed
Provider Google Moonshot

Snapshot . Cost uses a typical workload; tune it in the calculator. How we measure →

Which should you pick?

On a typical workload, Kimi K2 Thinking costs $430/mo against Gemini 3.1 Pro's $1,800/mo — roughly 4.2× cheaper. But the ranking depends on your output-to-input ratio: output is the pricier direction for both, so an output-heavy job (code generation, long answers) widens the gap while an input-heavy one (summarization, retrieval) narrows it. If you need to fit more in a single prompt, Gemini 3.1 Pro has the larger 1.0M-token window (~1,573 pages). Only Gemini 3.1 Pro accepts image input — decisive if your prompts include images.

These are list and routed market prices, not measured outcomes. Two models at the same rate can still cost different amounts to finish the same task, because verbose or reasoning-heavy models emit more tokens. That gap is exactly what measured cost-per-task captures.

Frequently asked questions

Is Gemini 3.1 Pro or Kimi K2 Thinking cheaper?

For a typical workload (1,500 input + 500 output tokens × 200,000 requests/month), Kimi K2 Thinking costs $430/mo versus $1,800/mo for Gemini 3.1 Pro — about 4.2× less. Because output is priced higher than input, the winner can flip if your workload writes much more or less than this; check your own numbers in the calculator.

What's the main difference between Gemini 3.1 Pro and Kimi K2 Thinking?

On price, Gemini 3.1 Pro is $2.00/$12.00 per 1M (in/out) and Kimi K2 Thinking is $0.60/$2.50. Gemini 3.1 Pro has the larger context window at 1.0M tokens. Gemini 3.1 Pro also accepts image input, while Kimi K2 Thinking is text-only.

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